<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react资料_stu//依赖包/react.development.js"></script>
    <script src="../react资料_stu//依赖包/react-dom.development.js"></script>
    <script src="../react资料_stu//依赖包/babel.min.js"></script>
</head>

<body>
    <div id="app"></div>
    <script type="text/babel">
        /* 
      当表单的value受state控制，则我们称作为受控表单
        - 受控表单三种用法
          1. 表单的初始值受控 直接书写defaultValue属性
          2. 表单是只读表单(设置了readOnly={true}) 直接设置value也是可以的
          3. 数据双向绑定:表单通过value受控,然后需要绑定onChange事件,事件中获取当前表单的值修改state
    
    */
        class Parent extends React.Component {
            state={
                name:'laowang',
                age:18,
                hobby:'抽烟'
            }

            render() {
                const{name,age,hobby}=this.state
                return (
                    <div>
                        姓名：<input type="text" defaultValue={name} />
                        <br/>
                        年龄<input type="text" value={age} />
                        <br/>
                        爱好<input type="text" defaultValue={hobby} />
                        <br/>
                        <button onClick={this.handle}>提交</button>
                    </div>
                )
            }
            handle = () => {
                const{name,age,hobby}=this.state;
               
               
                console.log(name,age,hobby);
            }

        }
        ReactDOM.createRoot(document.getElementById('app')).render(<Parent />)
    </script>
</body>

</html>